droste - screen saver.

       Jamie Zawinski.

X Version 11                                   6.08 (10-Oct-2023)                                     droste(6x)

       Copyright © 2023 by Jamie Zawinski.  Permission to use, copy, modify, distribute, and sell this  software
       and  its  documentation  for any purpose is hereby granted without fee, provided that the above copyright
       notice appear in all copies and that both that copyright notice and  this  permission  notice  appear  in
       supporting  documentation.   No  representations  are made about the suitability of this software for any
       purpose.  It is provided "as is" without express or implied warranty.

       Mise en abyme: infinite spiral recursion within images.

       Works best with images that have a central circular feature.

DISPLAY to get the default host and display number.

       XENVIRONMENT
               to  get  the  name  of  a  resource  file  that  overrides  the  global  resources  stored in the
               RESOURCE_MANAGER property.

       XSCREENSAVER_WINDOW
               The window ID to use with --root.

       droste - screen saver.

--visualvisual
               Specify  which  visual  to  use.   Legal  values are the name of a visual class, or the id number
               (decimal or hex) of a specific visual.

       --window
               Draw on a newly-created window.  This is the default.

       --root  Draw on the root window.

       --delaynumber
               Per-frame delay, in microseconds.  Default: 20000 (0.02 seconds).

       --durationnumber
               How long until loading a new image, in seconds.  Default: 2 minutes.

       --speednumber
               Speed of zooming into the image.  2.0 means twice as fast, 0.5 means half as fast.   Negative  to
               zoom out.

       --r1number
               Inner radius of the spiral.  Default: 0.2.

       --r2number
               Outer radius of the spiral.  Default: 0.7.

       --fps|--no--fps
               Whether to show a frames-per-second display at the bottom of the screen.

X(1), xscreensaver(1)

droste [--display host:display.screen] [--visual visual] [--window] [--root] [--delay number] [--duration
       seconds] [--speed ratio] [--r1 ratio] [--r2 ratio] [--fps]